Erin Callan climbed to the highest echelons of Wall Street, serving as chief financial officer of Lehman Brothers at just 41 years of age. She smashed through the glass ceiling as her brains, her personality and her good looks fueled a superstar career.

For once, Exxon Mobil (XOM) and its green counterparts appear to be on the same page. Both envision a U.S. that uses less energy in the future, although Exxon's estimates may be a bit more conservative and oily than advocates would hope.

Sometimes it seems like the competition between the major tech companies is a war of attrition, unfolding along many fronts. But as they battle over current market share, are they paying enough attention to the next generation of consumers?